Dough moulding machine



July 12, 1955 J. F. NAYLOR DOUGH MOULDING MACHINE Filed June 24, 1952 3 Sheets-Sheet l dcsepk Francis N l- '0 P Inventor y 12, 1955 J. F. NAYLOR 2,712,798

DOUGH MOULDING MACHINE Filed June 24, 1952 3 Sheets-Sheet 2 I nueator Jose B Francis N IoP y 12, 1955 J. F. NAYLOR 2,712,798

DOUGH MOULDING MACHINE Filed Jun 24, 1952 3 Sheets-Sheet s I Joseph Hand's Naq fwmtor y 1 WW' United States atcnt 2,752,193 Patented July 12, 1955 or to & T. Vicars Limited, Earle-stowu, Newton- --.iillows, England, a Eritish company Application June 24, 1952, Serial No. 295,23?

claims. or. 107-1 The present invention relates to dough extruding and the like machines of the type wherein a hopper to contain a supply of plastic material is disposed above one or more rollers co-operating with a plate or one with another to form, with side plates and a die box at the base, a compression chamber. A dual hopper may be disposed above the rollers, each section of which having a supply of plastic material from which a roller can feed a compression chamber, each chamber being in communication with apertures, particular to itself, in a common die box.

The plastic material in each section can be different, but they will be simultaneously and separately extruded. One said aperture may be disposed around the other to produce an extruded product having one material disposed around the other.

Such latter construction is known for the production, for example, of fig bars, wherein the material to be extruded through the outer aperture, which in the example would be dough, would be contained in one section, and the material to be extruded through the inner aperture, which in the example would be fig filling, would be contained in the other section.

In known machines of the type set forth, the constructions have been such that when attention is necessary for the purpose of cleaning and/or maintenance, the use of mechanical lifting appliances is required along with the services of a skilled engineer, and the time necessary to complete the operation is considerable.

it is an object of the present invention to provide a machine of the type set forth which is efficient in operation and simple in construction, and readily dismantled and assembled for the purpose of cleaning and maintenance, and further, having a compression chamber volume materially less than hitherto.

According to the present invention, in a machine of the type set forth, the die box is fastened solely to the side plates of the compression chamber. In a preferred form of construction the die box has plates adjustably secured to itself and adapted to act as means to adjust the space for material passing between themselves and the rollers while permitting the adjustment of the rollers relative to the division plate or to one another, as the case may be. The plates may be adjusted to be clear of the rollers to allow sheets of material, conforming approximately in thickness to the clearance, to be withdrawn from the compression chamber and returned, adhering to the peripheral surfaces of the rollers, to the hopper which is arranged to be clear thereof. In this way pressure in the chamber may be relieved if necessary, and by suitable adjustment of the plates the pressure of material being extruded through each die may be equalized.

The invention will be ample with reference which:

Fig. 1 is a side elevation of a preferred form of machine according to the present invention,

further described by way of exto the accompanying drawings in Fig. 2 is, at the left hand portion thereof, a sectional elevation on the line A-P; of Fig. l, and at the right hand portion thereof, a sectional elevation on the line AC of Fig. l, and

Fig. 3 is an enlarged detail of the die box as seen in Fig. 1.

In the drawings, a hopper 10, disposed above a pair of rollers ll, 11, has a removable division plate 12, having handles 12a, which extends from the die box 16 to the top of the hopper Ill), the rollers 11, 11 being on either side of the plate 12. With the plate in position, the plastic contents of the sections 13a and 1% can be difierent.

Each section 13a and 1012 will have its own pressure chamber consisting of a roll 11, the plate 12, part of fastened solely to the side plates 13 by means of bolts 17, has apertures 16a, 16b, the former disposed around the latter. The former communicates with the compression chamber associated with the section Illa containing dough, and the latter communicates with the compression chamber associated with the section 10b, containing fig filling. Adjustably attached to the die box sides are plates 16d, the upper edges of which are bevelled tangential thereto on lines parallel to the direction of adjustment of the rollers 11, and have as their object to adjust the space for material passing between themselves and the rollers while permitting the adjustment of the rollers 11, 11 relative to the division plate 12 or to one another, as the case may be (as may be seen with reference to Fig. 3, which shows the roller 11 in alternative position).

The plates 16:! are arranged across the width of the compression chamber and are secured thereto by the screws 16c. To adjust the plates relative to the rollers 11, 11, use is made of eccentrics 16f, engaging in slots 16g in the plates 16a. The eccentrics 16 are eccentric material, of the plates 160', from the comto the hopper. The rollers 11 are carried on shafts 11a, mounted on ball bearing assemblies 18, carried on slide blocks 19. The slide blocks are mounted on guides on the frame 14, and are adjustable by means of devices of known type, generally position shown in broken lines in Fig. 3). Driving means 11b are are mounted on the shafts 11a.

The die box 16 may be readily removed and replaced. A die box having one or more apertures may be employed and the division plate 12 removed to provide a rout machine having a single hopper and a single compression chamber with two opposite feed rollers. This die box may have the plates 16d on one side only or on both sides, according to circumstances.

The machine may be readily dismantled and assembled for the purpose of cleaning and maintenance. The division plate 12, hopper 10, die box 16 and side plates 13 are readily removable to expose the rollers. These parts may be handled manually without the necessity of lifting tackle, and the cleaning and maintenance operation should not require the services of a skilled engineer, and the time taken to accomplish would be relatively small.

I claim:

1. In a machine for extruding plastic material such as dough, wherein the material is fed to a compression chamber and exudes therefrom through a die, the combination of a machine frame, at least one roller bounding said compression chamber and supported rotatably at each end by shafts journalled in sides of the machine frame, side plates bounding said compression chamber in a lateral direction and mounted sides of the machine frame and the end faces of said roller in intimate surface contact with said end faces, said side plates having peripheral edges defining recesses within which said shafts are located respectively, whereby said side plates are removable from the machine without separation of said shafts from said sides of the machine frame, and a die box bounding said compression chamber and secured solely to said side plates.

2. In a machine for extrudingplastic material such as dough, wherein the material is fed to a compression chamber and exudes therefrom through adie, the combination of a machine frame, two spaced rollers bounding said compression chamber and providing an entry gap therebetween for admission of material to said compression chamber, shafts at each end of said rollers jour: nailed in sides of the machine frame, side plates bounding said compression chamber in a lateral direction and mounted interposed respectively between said sides of the machine frame and the end faces of said rollers in intimate surface contact with said end faces, the peripheral edges of said side plates being located clear of said shafts, whereby said side plates are removable from the machine without separation of said shafts from said sides of the machine frame, a die box bounding said compression chamber and secured solely to side side plates and a hopper disposed above said entry gap and detachably supported solely on said side plates.

3. In a machine for extruding plastic material such as dough, wherein the material is fed to a compression chamber and exudes therefrom through a die, the combination of a machine frame, at least one roller bounding said compression chamber and supported rotatably at each end by shafts journalled in sides of the machine frame, side plates bounding said compression chamber in a lateral direction and mounted interposed between said sides of the machine frame and the end faces of said roller in intimate surface contact with said end faces, said side plates having peripheral edges defining recesses within which said shafts are located respectively, whereby said side plates are removable from the machine without separation of said shafts from said sides of the machine frame, a die box bounding said compression chamber and secured solely to said side plates, a plate member extending axially of said roller over the length thereof and secured to said die box for adjustment relative to the peripheral surface of said roller whereby to enable a sheet of material conforming in thickness substantially to the clearance between said plate member and the peripheral surface of said roller to be Withdrawn from said compression chamber as said roller rotates, thereby relieving the pressure of material in said compression chamber.

4. In a machine for extruding plastic material such as interposed between said dough, wherein the material is fed to a compression chamber and exudes therefrom through a die, the combination of a machine frame, at least one roller bounding said compression chamber and supported rotatably at each end by shafts journalled in sides of the machine frame, side plates bounding said compression chamber in a lateral direction and mounted interposed between said sides of the machine frame and the end faces of said roller in intimate surface contact with said end faces, said side plates having peripheral edges defining recesses within which said shafts are located respectively, whereby said side plates are removable from the machine without separation of said shafts from said sides of the machine frame, a die box bounding said compression chamber and secured solely to said side plates, a plurality of juxtaposed plate members extending in the axial direction of said roller over the length thereof and each secured to said die box for independent adjustment relative to the peripheral surface of said roller whereby to enable material to be withdrawn from said compression chamber through clearance between said plate members and the peripheral surface of the roller, thereby relieving the pressure of material in said compression chamber.

5. In a machine for extruding plastic material such as dough, wherein the material is fed to a compression chamber and exudes therefrom through a die, the combination of a machine frame, two spaced rollers bounding said compression chamber and providing an entry gap therebetween for admission of material to said compression chamber, shafts at each end of said rollers journalled in sides of the machine frame, side plates bounding said compression chamber in a lateral direction and mounted interposed respectively between said sides of the machine frame and the end faces of said rollers in intimate surface contact with said end faces, the peripheral edges of said side plates being located clear of said shafts, whereby said side plates are removable from the machine without separation of said shafts from said sides of the machine frame, a die box bounding said compression chamber and secured solely to said sideplates, a hopper disposed above said entry gap and detachably supported solely on said side plates, a plurality of juxtaposed plate members associated with each of said rollers extending in the axial direction and over the length thereof, each of said plate members being secured to said die box for independent adjustment relative to the peripheral. surface of the associated roller whereby to enable material to be withdrawn from said compression chamber through clearance between said plate members and the peripheral surface of the roller associated therewith, thereby relieving the pressure of material in said compression chamber.

References ited in the file of this patent UNITED STATES PATENTS 443,862 Mitchell Dec. 30, 1896 997,554 Holmes July ll, l9ll 2,340,501 Aasted Feb. 1, 1944 FOREIGN PATENTS 417,852 Great Britain Oct. 15, 1934 

